<template>
  <div>
    <div class="todo-footer">
      <label>
        <input type="checkbox"  @click="allChecked" :checked="allChange" />
      </label>
      <span> <span>已完成{{changeDone}}</span> / 全部{{todoList.length}} </span>
      <button class="btn btn-danger" @click="deleteAllTodo">清除已完成任务</button>
    </div>
  </div>
</template>

<script>
export default {
  name: "Footer",
  props:["deleteAllTodo" ,"todoList","changeDone","allChecked"],
    computed:{
        allChange(){
            return this.todoList.every(item => item.done ) && this.todoList.length !==0
        }
    }
};
</script>

<style lang="css" scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>